| 摘要 |
PURPOSE:To obtain a miniaturized and stable damping device by constituting double vibration parts so as to attenuate vibration by the throttle effect due to the clearances formed between a bearing holder and a bearing case. CONSTITUTION:A bearing holder 5 is oscillatedly turned following the turning vibration of a shaft 1, and for this vibration the lubricating oil 4 in the cylindrical clearance 7 formed on both the inner and outer circumferential surfaces of the bearing holder 5 flows in the circumferential and axial directions to absorb vibration. In this case, the bearing device is double provided with clearances a, b narrow in the axial direction. Accordingly, the axial flow of the lubricating oil 4 is subject to restriction by the throttle effect of the clearances a, b, and a miniaturized and stable damping device can be obtained.
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